Dean: And why would an angel rescue me from Hell?
Castiel: Good things do happen, Dean.
Dean: Not in my experience.
Castiel: What's the matter? You don't think you deserve to be saved?

Castiel: Can I tell you something if you promise not to tell another soul?
Dean: Okay.
Castiel: I’m not a…hammer as you say, I have questions, I have doubts.
I don’t know what is right and what is wrong anymore, whether you passed or failed here.
But in the coming months you will have more decisions to make, I don’t envy the weight that’s on your shoulders Dean. I truly don’t.

Dean: Well, then you guys are screwed. I can’t do it, Cas. It’s too big.
Alastair was right. I’m not all here, I’m not—I’m not strong enough.Well, I guess I’m not the man either of our dads wanted me to be.
Find someone else. It’s not me.

Castiel: With God's help, we can win.
Dean: It's a pipe-dream, Cas.
Castiel: I killed two angels this week. That's my brothers. I'm hunted, I rebelled,and I did it - all of it - for you.

Dean: I mean, I've had more fun with you in the past twenty-four hours than I've had with Sam in years.
And you're not that much fun. It's funny, you know, I've been so chained to my family, but now that I'm alone... hell, I'm happy.

- Because Castiel gripped Dean tight and raised him from perdition
- Because Castiel believes good things do happen, to people who deserve them
- Because Castiel believes Dean deserved to be saved
- Because Castiel thought Dean was special
- Because only Dean would insult an angel, and threaten to kick its ass
- Because Castiel is one of the few who can put Dean in his place
- Because Dean should show him some respect
- Because Misha and Jensen have insane chemistry and intensity in their scenes together!
- Because Castiel knows the nightmares that haunt Dean
- Because when it comes to Dean, Castiel is allergic to straight answers
- Because you can't tell, but Castiel finds it funny dropping in on Dean unexpectedly and surprising him
- God might not be Dean's co-pilot, but Castiel is
- Because Castiel was genuinely sorry Dean couldn't change the past
- Because Castiel thinks Dean shouldn't be too hard on himself
- Because Castiel helped Dean see the truth
- Because now they both know as much as each other
- Because Castiel gave Dean fair warning about Sam
- Because Dean called him 'Cas'
- Because in his moment of trouble, Dean prayed for Castiel
- Because Dean has become attuned to his presence
- Because Castiel believes in Dean
- Because Castiel thinks Dean has potential
- Because Castiel will follow Dean
- Because Castiel prayed for Dean
- Because Castiel laughed at a Deanism
- Because Castiel can confide in Dean
- Because Castiel will help him carry the terrible weight on his shoulders
- Because Castiel likes Dean
- Because Dean is his weakness
- Because Castiel didn't want to threaten Dean
- Because Dean saved Castiel's life
- Because they're both warriors
- Because Dean is the only one that will help him
- Because Cas did it, all of it, for Dean
- Because Cas risked everything for Dean
- Because Dean wouldn't let Cas die a virgin
- Because Cas is the reason Dean is laughing again
- Because Cas doesn't know the meaning of 'personal space'
- Because five years into the future and they're still side by side
- Because Dean doesn't want to lose Cas too
- Because Dean looked so broken when Cas wasn't breathing
- Because Dean picked up Cas' trench coat and took it with him
- Because Jensen thought to have Dean pick up Cas' trench coat when no one else did
- Because Cas was one of the best friends Dean ever had
- Because Jensen thinks Dean can still depend on Cas after everything

POSSIBLE FUTURE THREAD TITLES

- Because Cas wouldn't die a virgin on Dean's watch
- Because five years into the future, they're still side by side

Yeah a lot of the Cas fans took off after they started messing with his character. But in the last episode it looked like he was getting back to his Cas like self. (although I will never understand how he could just snag another angels grace. Why has no angel done this before? )

Exactly, if we had some hint of it before it would have been believable, but they did a whole story arc of Anna finding her grace, why didn't she just steal somebody elses? It's like ooh fans don't seem to be catching on to Cas the human, give him some grace.